html, body {
	margin: 0px 0px 0px 0px;
	padding: 0px 0px 0px 0px;
	width: 100%;
	height: 100%;
	overflow: hidden;
	position: absolute;
}

.viewPort, .viewPortFrame {
	width: 640px;
	height: 480px;
	left: 50%;
	top: 50%;
	margin-left: -320px;
	margin-top: -240px;
	position: absolute;
	overflow: hidden;
}

.viewPortFrame {
	margin-top: -241px;
	margin-left: -321px;
	border: 1px solid red;
	opacity: 0.5;
}
